Night Shift (Low Sound) Operation - Hitachi FSG1 Series Technical Catalogue

10.3.11. NIGHT SHIFT (LOW SOUND)
OPERATION
By Changing No.2 of the dip switch, DSW5, the night shift
(low sound) operation can be set. In case of the night shift
operation, the cooling capacity is decreased down to 60%.
The night shift operation shall be applied only in case that
the cooling capacity has the margin to be allowed for the
capacity decrease and the low sound operation is required
especially in the nighttime
ON
1 2 3 4 5 6 7 8
Set No.2 at "ON
§
Outdoor Fan
Maximum
Rotation
(Rotation Ratio)
Outdoor temperature
?
NOTE:
The maximum rotation is always 100% (rotation ratio)
for the standard unit. (no limitation of the outdoor
temperature)
§
Frequency Range
When
Night
Shift Is
Not Set
When
Night
Shift Is
Converter Frequency of Constant Speed Compressor
(°C)
?
AVAILABLE OPTIONAL FUNCTIONS
Outdoor Unit Minimum
Capacity (HP) Frequency
5
8
10
16 30Hz
20
24
30
5
8
10
16 30Hz
20
Set
24
30
Power Supply Frequency
Outdoor Unit
Capacity (HP)
50 Hz
8 50 Hz
10 62 Hz
16
70´2 Hz
20 70´3 Hz
24 70+100´2Hz
30
70+140´2Hz
NOTE:
The maximum Frequency for the 8~20 HP outdoor
uniy is indicated as; Inverter Frequency + Converter
Frequency of Constant Speed Compressor.
10
/17
Maximum
Conditions
Frequency
95 Hz
165 Hz
177 Hz
Except for the
255 Hz
conditions below
325 Hz
385 Hz
465 Hz
50 Hz
100 Hz
1. Night Shift
Operation
114 Hz
2. Cooling
140 Hz
Operation
176 Hz
3. Outdoor Fan:
211 Hz Below 70%
255 Hz
60 Hz
60 Hz
74 Hz
84´2 Hz
84´3 Hz
84+120´2 Hz
84+168´2 Hz